Design_array contains item administration information at all time points in the Spatial
Rotation Learning Program.
Design_arrayAn array of dimension N-by-J-by-L, containing each subject's item administration.
Spatial Rotation Learning Experiment at UIUC between Fall 2015 and Spring 2016.
The data object "Design_array" contains an array of dimension N-by-J-by-L
indicating the items assigned (1/0) to each subject at each time point.